a-a a-b aaa aab aad aae aao aas aau ab- aba abb abd abe abo abs abu ad- ada adb add ade ado ads adu aea aeb aed aee aeo aes aeu aoa aob aod aoe aoo aos aou as- asa asb asd ase aso ass asu au- aua aub aud aue auo aus b-u baa bab bad bae bao bas bau bba bbb bbd bbe bbo bbs bbu bda bdb bdd bde bdo bds bdu be- bea beb bed bee beo bes beu boa bob bod boe boo bos bou bsa bsb bsd bse bso bss bsu bua bub bud bue buo bus buu daa dab dad dae dao das dau dba dbb dbd dbe dbo dbs dbu dda ddb ddd dde ddo dds ddu de- dea deb ded dee deo des deu doa dob dod doe doo dos dou dsa dsb dsd dse dso dss dsu dua dub dud due duo dus eaa eab ead eae eao eas eau eba ebb ebd ebe ebo ebs ebu ed- eda edb edd ede edo eds edu eea eeb eed eee eeo ees eo- eoa eob eod eoe eoo eos eou es- esa esb esd ese eso ess esu eu- eua eub eud eue eus oaa oab oad oae oao oas oau ob- oba obb obd obe obo obs obu oda odb odd ode odo ods odu oea oeb oed oee oeo oes oo- ooa oob ood ooo oos os- osa osb osd ose oso oss osu ou- oua oud oue ouo ous saa sab sad sae sao sas sau sba sbb sbd sbe sbo sbs sbu sda sdb sdd sde sdo sds sdu se- sea seb sed see seo ses seu soa sob sod soe soo sos sou ss- ssa ssb ssd sse sso sss ssu sua sub sud sue suo sus suu ua- uaa uab uad uae uao uas uau uba ubb ube ubo ubs ubu uda udb udd ude udo uds udu uea ueb ued uee ues uoa uob uod uoe uoo uos usa usb usd use uso uss usu uua uue uus uuu